Wireless Positioning Channel Selection for Accuracy
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Solution Overview
Problem
The accuracy of locating terminal devices in wireless communications systems is low due to varying transmission environments across different channels, which affects the precision of positioning methods used in prior art.
Innovation Solution
A positioning method that involves obtaining information about the transmission environment of each channel, selecting a target channel with a better transmission environment, and using positioning measurement information from that channel to locate the terminal device, thereby improving accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If positioning measurement information from multiple channels is used, then positioning coverage is improved, but positioning accuracy deteriorates due to varying transmission environments
Solution Approach 1:
The patent applies local quality by evaluating and selecting channels based on their specific transmission environment characteristics (LOS/NLOS) rather than treating all channels uniformly. The system identifies channels with favorable transmission conditions (LOS or near-LOS) and uses those for positioning, thereby improving accuracy while adapting to local environmental variations.
Solution Approach 2:
The patent changes the parameter of channel selection criteria from generic to environment-specific. By introducing transmission environment information (LOS/NLOS classification) as a selection parameter, the system dynamically adjusts which channels are used for positioning based on actual propagation conditions, resolving the contradiction between coverage and accuracy.
2Measurement precision
If all channels are used for positioning, then system complexity is reduced, but positioning accuracy deteriorates due to NLOS transmission interference
Solution Approach 1:
The patent applies preliminary action by obtaining transmission environment information for channels before performing positioning calculations. The system pre-evaluates channel characteristics (LOS/NLOS status) and uses this information to select appropriate channels for positioning, avoiding the need to process all channels and reducing overall system complexity while maintaining accuracy.
Solution Approach 2:
The patent extracts and removes channels with unfavorable transmission environments (NLOS channels) from the positioning calculation set. By separating and excluding channels that would degrade accuracy due to multipath interference, the system maintains positioning precision while simplifying the effective processing scope to only relevant channels.
3Measurement precision
If NLOS channels are used for positioning, then positioning coverage is extended, but positioning accuracy deteriorates due to multipath interference
Solution Approach 1:
The patent converts the harmful effect of NLOS channels into a beneficial selection criterion by using transmission environment information to identify and exclude problematic channels. The system leverages the availability of channel environment data (which would otherwise be unused) to actively prevent multipath interference from degrading positioning accuracy, turning potential harm into a protective mechanism.
Solution Approach 2:
The patent introduces transmission environment information as an intermediary factor between the available channels and the positioning calculation. This intermediary layer (channel environment data) mediates the selection process, allowing the system to filter out channels that would introduce harmful multipath effects while maintaining coverage through LOS and near-LOS channels.
Data Source
AI summary
This application provides a positioning method and apparatus. The method includes: obtaining, by a positioning apparatus, information about a transmission environment of each channel in a plurality of channels for a terminal device; determining, by the positioning apparatus, a target channel from the plurality of channels based on the information about the transmission environment of each channel; and locating, by the positioning apparatus, the terminal device based on positioning measurement information of the target channel. The positioning method and apparatus provided in this application helps improve positioning accuracy.